/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Operations/WeldEdgeSequence.h
Splits largest edges of the span with fewest vertices so that both input spans have an equal number of vertices and edges after
EWeldResult::OK on success
[EWeldResult](API\Plugins\DynamicMesh\Operations\FWeldEdgeSequence\EWeldResult) SplitSmallerSpan()